1. Proto-Norse - Noun
2. Proto-Norse - Proper noun
the Germanic language of Scandinavia up until about 700
Source: WordNetAs Proto-Norse evolved into Old Norse, in the 8th century, the effects of the umlauts seem to have been very much the same over the whole Old Norse area. Source: Internet
Old West Norse was also characterized by the preservation of u-umlaut, which meant that for example Proto-Norse *tanþu "tooth" was pronounced tǫnn and not tann as in post-runic Old East Norse; OWN gǫs and runic OEN gǫs, while post-runic OEN gás "goose". Source: Internet
Proto-Norse eril, or the later Old Norse jarl, came to signify the rank of a leader. Source: Internet
Sturtevant says that the Old Norse proper name Tunne (derived from Proto-Norse *Tunþē) refers to "a person who is characterized as having some peculiar sort of tooth" and theorizes a Proto-Germanic form of -toskr. Source: Internet